Whats the ideal temperature for running in high humidity?
If running at 50-60 deg F is ideal for a marathon in low humidity (RH < 60%) then what is the ideal temp for high humidity (RH > 60%) ?
Is it the same?
It is the same but the value is more like 40-45F not 60F. I was mentally stuck on a number of 60F that Ive heard about some long time ago, so I didnt even read the article close enough. My personal fastest times came with temps around 45F.
Loved the NOAA heat index provided by brentwpeterson; it was right on target. Once again I had a heat index table and some other methodology that didnt match up with what I was seeing. The NOAA heat index is spot on. My area is +95% RH nearly every morning and I definitely notice the ramp up in heat just above 80F. Plus the increase in heat index due to the sun and decrease due to wind is something Ive noticed as well. The impact on pace is dramatic, and for me at the time I wasnt drinking properly making it even worst.
One note for people reading this and trying to deal with humidity. From my experience short fast runs 3-4 miles doesnt have the same dramatic impact that longer runs have. My 5k speed is progressing evenly through all seasons and it definitely depends more one training than weather, so summer is for speedwork I guess and learning how to do the ultra shuffle for long runs.
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Everyone body behaves differently to temperature and humidity, but you can look at the "Heat Index" If the heat index is high enough then you know that you will have to adjust your pace for the race.
For example: If you are running a Marathon at 90f and 90% humidity the heat index will be 122. If the temp is 80 and the humidity is 40% then the heat index is 80.
www.nws.noaa.gov/om/heat/heat_index.shtml
I don't think you will have a problem when the temp is lower than 70f. Most heat index chart start at 75-80f.
For the "Ideal" temp it is what your body can handle. The higher the temp and humidity the more you should adjust your pace.
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